Income Taxes Operating Loss Carryforwards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating loss carryforwards [Abstract]
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	$ 9,653	$ 12,617	$ 20,004
UNITED STATES
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	14,800
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	1,400
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 18,400